netdev - [PATCH RFC net-next 4/6] sock: permit SO_ZEROCOPY on PF

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Message-Id: <1a25fd67586301a5d8e8fa91152e0cd07bc5ee0f.1516147540.git.sowmini.varadhan@oracle.com>
Date:   Wed, 17 Jan 2018 04:20:02 -0800
From:   Sowmini Varadhan <sowmini.varadhan@...cle.com>
To:     netdev@...r.kernel.org, willemdebruijn.kernel@...il.com
Cc:     davem@...emloft.net, rds-devel@....oracle.com,
        sowmini.varadhan@...cle.com, santosh.shilimkar@...cle.com
Subject: [PATCH RFC net-next 4/6] sock: permit SO_ZEROCOPY on PF_RDS socket

allow the application to set SO_ZEROCOPY on the underlying sk
of a PF_RDS socket

Signed-off-by: Sowmini Varadhan <sowmini.varadhan@...cle.com>
---
 net/core/sock.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/net/core/sock.c b/net/core/sock.c
index 4f52677..f0f44b0 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -1049,6 +1049,13 @@ int sock_setsockopt(struct socket *sock, int level, int optname,
 		break;
 
 	case SO_ZEROCOPY:
+		if (sk->sk_family == PF_RDS) {
+			if (val < 0 || val > 1)
+				ret = -EINVAL;
+			else
+				sock_valbool_flag(sk, SOCK_ZEROCOPY, valbool);
+			break;
+		}
 		if (sk->sk_family != PF_INET && sk->sk_family != PF_INET6)
 			ret = -ENOTSUPP;
 		else if (sk->sk_protocol != IPPROTO_TCP)
-- 
1.7.1